/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Drawing/PolyEditPreviewMesh.h
void InitializeExtrudeType ( [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) && BaseMesh, const FVector3d & TransformedOffsetDirection, const FTransform3d * MeshTransform, bool bDeleteExtrudeBaseFaces )